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A watermark stored in a data file refers to a method for ensuring data integrity which combines aspects of data hashing and digital watermarking. Both are useful for tamper detection , though each has its own advantages and disadvantages.
desktop product to create, review, edit, share or archive PDF and XPS documents. After 30 days a watermark is placed on documents in shareware version. LibreOffice: Free (Mozilla Public License) an Office suite; allows to export (and import, with accuracy limitations) PDF files. Microsoft Word 2013: Proprietary: Desktop software.
A Watermark for data synchronization describes an object of a predefined format which provides a point of reference value for two systems/datasets attempting to establish delta/incremental synchronization; any object in the queried data source which was created, modified, or deleted after the watermark's value will be qualified as "above watermark" and should be returned to the client ...
A digital watermark is called imperceptible if the watermarked content is perceptually equivalent to the original, unwatermarked content. [7] In general, it is easy to create either robust watermarks or imperceptible watermarks, but the creation of both robust and imperceptible watermarks has proven to be quite challenging. [2]
Audio watermark, techniques for embedding hidden information into audio signals; Watermark (data file), a method for ensuring data integrity which combines aspects of data hashing and digital watermarking; Watermark (data synchronization), directory synchronization related programming terminology; Watermarking attack, an attack on disk ...
It is a shaded watermark first used in 1848 that incorporates tonal depth and creates a greyscale image. Instead of using a wire covering for the dandy roll, the shaded watermark is created by areas of relief on the roll's own surface. Once dry, the paper may then be rolled again to produce a watermark of even thickness but with varying density.
Solid PDF Tools recognizes columns, can remove headers, footers and image graphics and can extract flowing text content. Selective content extraction is supported, allowing the conversion of specific text, tables, or images from a PDF file while also providing for the combination of multiple PDF tables into a single Excel worksheet. [3]
An audio watermark is a unique electronic identifier embedded in an audio signal, typically used to identify ownership of copyright. It is similar to a watermark on a photograph. Digital watermarking is the process of embedding information into a signal (e.g. audio, video or pictures) in a way that is difficult to remove.